Improvement in sheet-delivering apparatus for printing-machines



. a 0. B. GOTTRELL. Sheet-Delivering Apparatus for Printing-Machines.

No. 203,710. 4 Patented May14, 1878.-

7 To all whom it may concern:

of Westerly, in the county of Washington 'and State of Rhode Island,have invented DeliveringApparatus for Printing-Machines, of which thefollowing isa description, refume]: S"rA'ras" PATENT ()FFIGE.

. CALVERT B. OOTTRELL, on wEsrnRLY, nnonn ISLAND, Assrcnon on ONE-HALFHIS RIGHT TO NATHANBABGOOK, OF SAME PLACE.

1 IMPROVEMENT IN SHEET-DELIVERING; APPARATUS FOR PRlNTlNG-MACHINES.

Specification forming part of Letters Patent Nd. 203, 710, dated May aOctober 30,1877. 7

Be it known that I, CALVERT B. OorrRELL,

certain new and useful Improvements in Sheeterence being had to theaccompanying drawing, which forms part of this specification.

This invention consists in certain combinations of devices, organized tooperate in certain relation with each other, whereby, with the use oftransferring-gripers, attached to a rotating cylinder or wheels, I amenabled to print with as narrow a margin asmay be desired; and otheradvantages are obtained, including the giving of ample time for thegripers on the impression-cylinder to let go before the gripers on thetransferring cylinder or wheels take hold of the sheet.

Figure 1 represents a plan of a cylinder printing-press, in part, havingmy invention applied; and Fig. 2, a vertical section of the same on theline or as, showing, also, the feedboard of the press. Figs. 5 and 4 aretransverse sections of the impression-cylinder and transferringapparatus in different working positions.

A represents the frame of a cylinder printing-press. This frame may beof any suitable construction. B is the impression-cylinder, providedwith gripers b b, the function of which is as usuaL I' O is thefeed-board, over which the sheet is fed to the gripers of theimpression-cylinder. The advance edge of the sheet need not necessarilyproject beyond the edge 0 of the opening din the impressioncylinder,within which the gripers b I) work, and said gripers, when closed, mayonly slightly overlap the edge 0, in order to print the sheet with asnarrow a margin as may be desired. Parallel with theimpression-cylinder, on the delivery side of the latter, is a rotarytransferring-cylinder or series of wheels, D D, provided with gripers ff, which convey the sheet to the flier or elsewhere. These gripers f fare organized to open and close below a line or plane intersecting theaxes of the impression and transferring cylinders, as represented by theline y y in Figs. 3 and 4.; and

1 4, 1878 application filed Y the gripers b b of the impression-cylinderare opened to let go the sheet some time or distance in advance of thetransferring-gripers being closed to take hold of it, so that the oneset of gripers in no way interferes with.

the other set of gripers. To make this practicable on sheets with narrowmargins it is necessary that the advance edge of the sheet should beliberated from the impression-cylinder and turned out or off from itbefore said axes of the impression and transferring cylinders, in orderthat the transferring-gripers may get hold of it. Below the transferringcylinder or wheels D D, on the delivery side I of theimpression-cylinder B, is a presser, Gr,

arranged to come into operation on the sheet before the gripers of theimpression-cylinder let go, in order that the sheet may be held fromdropping, and its passage, free from gripe of its advance edge, becontinued by the rotation of the impression-cylinder till thetransferring-gripers f f get hold of it.

Such presser, which thus operates on the sheet in the interval betweenits release by the gripers of the impression-cylinder and its seizure bythe transferring-gripers, may be'variously constructed. Thus, it mayconsist of a series of rollers, g 9, upon ashaft, h, in pivoted orswinging bearings 6, controlled by springs k, to keep the rollers inelastic contact with the impression-cylinder; or said presser may havepointed pins or other pressing devices substituted for the rollers g g.

In Fig. 3 the sheet S is represented as released from hold by theimpression-gripers b, and as subjected to the control of the presser Gprior to its seizure by the transferring-gripers f, and with the advanceedge of the sheet turned outward or away from the impressioncylinderready for the transferring-gripers f to take hold of it, which latteraction or seiz ure takes place before'the transferring-gripers cross theline or plane y 3 as represented in Fig. 4. I

A shoo-fly, m, may, if desired, he used to cast ofi the edge of thesheet from the impression-cylinder after it has been liberated from thegripers of the latter; or the shoofly may be dispensed with, and thesheet be thrown off by-its elasticity, or by the action of theatmosphere, or by centrifugal action.

The rotating transferring-wheels D D or cylinder, as the case may be,may receive their or its necessary motion by gears n 0 from theimpression-cylinder B.

The gripers b of the impression-cylinder may be closed when receivingthe sheet from the striking first one and then another fixed pin orstop, 0 c,- and said gripers are kept closed,

when not thus acted upon, by a spring, d, applied to another arm on theopposite end of the griper-spindle to that which carries the arm I).

In the example represented, the transferring cylinder or wheels 1) beinggeared to make two revolutions for each one of the impressioncylinder,the gripers f f only receive a sheet from the latter cylinder duringeach alternate rotation of their own cylinder or wheels D, and in theintermediate rotations they perform no duty.

When a shoo-fly, m, is used, it may be kept 7 closed by aspring, e,acting on a double-armed lever, f, attached to the spindle of theshoofly, and the latter be opened to cast off the sheet by a pin on saidlever f riding over or against a fixed cam or incline, g.

I claim- 1. The combination, with the impressioncylinder and therotating transferring cylinder or wheels, of gripers attached to theimpression-cylinder, which open in the delivery of the sheet below aline or plane intersecting the axes of the impression-cylinder andtransferring cylinder or wheels, and gripers attached to the latterwheels or cylinder, which both open and close below the said line orplane, substantially as herein set forth.

2. The combination, with the impressioncylinder and its gripers and thetransferring cylinder or griper-wheels and its gripers, opening andclosing in the positions or relations described, of a presser, Gr,arranged to hold the sheet up to the impression-cylinder as or beforethe sheet is released by the gripers of the latter, and till it isseized by the transferring-gripers by the closing action of the latterbelow a line or plane intersecting the axes of the impression-cylinderand transferring cylinder or wheels, essentially as described.

OALVERT B. OOTTRELL. Witnesses:

A. GREGORY, FRED. HAYNES.

